CN102719697A - Special alloy with function of paraffin inhibition and application thereof - Google Patents
Special alloy with function of paraffin inhibition and application thereof Download PDFInfo
- Publication number
- CN102719697A CN102719697A CN2011100793476A CN201110079347A CN102719697A CN 102719697 A CN102719697 A CN 102719697A CN 2011100793476 A CN2011100793476 A CN 2011100793476A CN 201110079347 A CN201110079347 A CN 201110079347A CN 102719697 A CN102719697 A CN 102719697A
- Authority
- CN
- China
- Prior art keywords
- special alloy
- alloy
- wax
- wax control
- crude oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000956 alloy Substances 0.000 title claims abstract description 62
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 62
- 239000012188 paraffin wax Substances 0.000 title abstract description 9
- 230000005764 inhibitory process Effects 0.000 title abstract 3
- 239000010779 crude oil Substances 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000005516 engineering process Methods 0.000 claims abstract description 5
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 5
- 239000003921 oil Substances 0.000 claims description 17
- 239000003129 oil well Substances 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims description 4
- 229910052684 Cerium Inorganic materials 0.000 claims description 2
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 2
- 229910052779 Neodymium Inorganic materials 0.000 claims description 2
- 229910052777 Praseodymium Inorganic materials 0.000 claims description 2
- 229910052746 lanthanum Inorganic materials 0.000 claims description 2
- 239000001993 wax Substances 0.000 abstract description 67
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000005406 washing Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 238000011010 flushing procedure Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 4
- 239000007769 metal material Substances 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 4
- 230000008021 deposition Effects 0.000 abstract description 2
- 230000003993 interaction Effects 0.000 abstract description 2
- 238000005054 agglomeration Methods 0.000 abstract 1
- 230000002776 aggregation Effects 0.000 abstract 1
- 239000003112 inhibitor Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 8
- 239000000843 powder Substances 0.000 description 6
- 238000005086 pumping Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 230000006698 induction Effects 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 229910017709 Ni Co Inorganic materials 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000011162 core material Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000005242 forging Methods 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005491 wire drawing Methods 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005421 electrostatic potential Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
A special alloy with a function of paraffin inhibition is characterized in that the special alloy contains the following elements of: by weight, 65-95% of Cu, 3-30% of Ni, 1.0-5.0% of Co and 0.1-0.5% of RE, wherein RE is rare earth element. With the application of the special alloy in crude oil production wax inhibitor/removal technology, crude oil production efficiency is not only raised, but pollution caused by hot washing/chemistry-flushing well is also avoided. Therefore, the special alloy has obvious social and economic values. The paraffin inhibition special alloy is a novel functional material and has a good subject research value and a development prospect for the research on interaction effect of a metal material and a liquid and the development of a novel functional material by its electrocatalysis effect of crude oil composition and a special function of changing wax deposition agglomeration behavior.
Description
Technical field
The present invention relates to metal material field, a kind of special alloy and application thereof with wax control function is provided especially.
Background technology
Generally all contain wax in the crude oil, there is the very high oil field of many wax contents in China.When oil producing operation; Crude oil constantly reduces owing to temperature from the process of subsurface to surface; Wax in the crude oil can be separated out after temperature reaches wax precipitation piont (generally about 40 ℃) and on sucker rod and tube wall, condensed, and the operation that finally causes pumping stops, and must remove the wax that solidifies through " well-flushing " and could continue oil pumping; Therefore, clear wax control becomes the important technical links of crude production.The most frequently used method of well-flushing is that heat is washed or paraffin removing with chemical method; Above method is no doubt effective, but just can restart the operation of pumping after must stopping oil producing operation and experiencing the drainage period of a couple of days, and the discharging of a large amount of chemical substances is arranged simultaneously; Had a strong impact on crude production efficient, and contaminate environment.In the ground system (oil pipeline and crude Treatment system) of crude production, also there is same clear wax control problem.
Summary of the invention
The object of the present invention is to provide a kind of separating out and the novel wax control alloy and the application thereof of the function of reuniting of wax in the crude oil for inhibiting that have; This alloy has special electrochemical activity; Effective the separating out, precipitate and reunite of wax in the crude oil for inhibiting, the wax control that can be used for the down-hole, oil field is handled.
A kind of special alloy provided by the invention with wax control function; It is characterized in that: described special alloy includes following component (weight percent wt%): Cu 65～95, and Ni 3～30, and Co 1.0～5.0; RE 0.1～0.5; Wherein, RE is a REE, and described REE is specially one of La, Ce, Pr, Nd, Gd or its combination.As preference, can also contain following component one or more (weight percent wt%) in the described special alloy: Ti 0.2～0.5, and B 0.03～0.10.
Special alloy with wax control function provided by the invention; Its concrete preparation method is following: adopt vacuum induction furnace melting under normal pressure, vacuum or Ar atmosphere protection; Adopt normal pressure or vacuum pouring, ingot mould fully is preheated to proper temperature has uniform macrostructure and microtexture to guarantee alloy; Then through forging, processing a material after rolling, the wire drawing; Or after mother alloy is processed in melting, to adopt the powder by atomization technology to process granularity be micron-sized alloy powder.
Special alloy with wax control function provided by the invention is when using; Alloy wire is used flame plating; Alloy powder is with plasma body or other spraying technology; Alloy powder is sprayed on the steel of making wax control instrument or the surface of other metallic substance, forms highly active surperficial wax control alloy layer, 0.1～30 micron of thickness.
Wax control alloy of the present invention is the electronegativity difference that utilizes paraffin in alloy and the crude oil; Make alloy in alloy-crude system, have the static catalytic activity, can change the electrostatic potential and the polarity of paraffin molecule from the crude oil that its surface current is crossed, make the wax of separating out in the crude oil be in the dispersive suspended state; Avoid wax to condense in the bulk of pipeline and wall; Wax is flowed out with crude oil liquid, reach the purpose of wax control, be applicable to all kinds of oil wells and ground, oil field crude oil transportation systems such as well on the beam, unloading well.
Special alloy with wax control function provided by the invention; Be to change the wax electronic structure of molecule and then change the brilliant reunion behavior of wax through electrochemical action; Effectively suppress and slow down the piece that condenses into of wax, impel the wax of separating out to float on a liquid and with liquid-flow, therefore with small crystal habit; Effectively prevent and delay wax condensing on tube wall, sucker rod, thereby prolong the clean-out service cycle of oil well.The wax control alloy except that improving crude production efficient, has also been avoided the pollution that hot washing/chemical well-flushing causes as the clear wax control The application of new technique of a kind of crude production, has tangible society and economic worth; The wax control special alloy is a kind of new function material; It is to the specific function of electrochemical catalysis effect with the deposition reunion behavior that changes wax of oil component; Interaction and development new function material to research metallic substance and liquid have good subject researching value and development prospect.
Special alloy with wax control function provided by the invention also has following advantage:
(1) wax control: after crude oil and the special alloy effect, the precipitation rate of the wax in the crude oil when temperature reduces significantly reduces, and the amount of separating out that is observed visually obviously reduces;
(2) improve crude production efficient: compare with using paraffin removal and control method machinery or physics, use the wax control special alloy to be used for oil well paraffin prevention, the snaking cycle can significantly be prolonged, significantly reduce the time of the operation that stops to pump;
(3) environmental protection: compare with common chemical paraffin removal method, oil well uses wax control alloy wax control, has avoided emission of harmful substances;
(4) inexpensive: the wax control alloy only plays katalysis, can life-time service.
Embodiment
Embodiment 1
A kind of special alloy with wax control function, the composition of alloy (weight percent wt%) as shown in the table:
| Cu | Ni | Co | Gd |
| 88.0 | 10.5 | 1.0 | 0.5 |
Concrete preparation method is following: adopt vacuum induction furnace melting under normal pressure, adopt the normal pressure cast, through forging, process after rolling, the wire drawing material of φ 2; Process the wax control instrument with stainless steel, the wax control instrument is combined by porous inner cylinder and atresia urceolus, with flame plating spray coating alloy at the internal surface of inner core and the internal surface of outside surface and urceolus, 22 microns of thickness.Crude oil sprays entering urceolus entering oil pumping pipeline after flowing into inner core, and crude oil and alloy surface layer fully act on during this period.
1100 meters of oil well depths, 5.8 tons/day of oilwell produced fluid amounts, 2.3 tons/day of oil offtake; Water ratio 60%, wax content 14.5%, former employing hot-washing wax remover; Hot washing period 35 days, period of removing the wax extends to 274 days behind down-hole, the oil field wax control instrument that employing wax control alloy is processed, and wax control result is remarkable.
Embodiment 2
A kind of special alloy with wax control function, the composition of alloy (weight percent wt%) as shown in the table:
| Cu | Ni | Co | Ti | Pr+Nd | B |
| 71.0 | 25.4 | 2.8 | 0.3 | 0.4 | 0.1 |
Concrete preparation method is following: adopt vacuum induction furnace melting under vacuum, adopt vacuum pouring, through forging, process after rolling, the wire drawing material of φ 2; Process the wax control instrument with stainless steel, the wax control instrument is combined by porous inner cylinder and atresia urceolus, with flame plating spray coating alloy at the internal surface of inner core and the internal surface of outside surface and urceolus, 16 microns of thickness.Crude oil sprays entering urceolus entering oil pumping pipeline after flowing into inner core, and crude oil and alloy surface layer fully act on during this period.
About 1500 meters of oil well depth, 7.8 tons/day of oilwell produced fluid amounts, 1.7 tons/day of produce oils; Water ratio 78%, wax content 21.1%, former employing hot-washing wax remover; Hot washing period 35 days, period of removing the wax extends to 234 days behind down-hole, the oil field wax control instrument that employing wax control alloy is processed, and wax control result is remarkable.
Embodiment 3
A kind of special alloy with wax control function, the composition of alloy (weight percent wt%) as shown in the table:
| Cu | Ni | Co | Ti | La+Ce |
| 91.0 | 7.0 | 1.1 | 0.4 | 0.5 |
Concrete preparation method is following: adopt vacuum induction furnace melting under the Ar gas shiled, adopt the normal pressure cast, become mother alloy after the pulverizing.Process the micron order alloy powder with atomising unit.Process the wax control instrument with stainless steel, the wax control instrument is combined by porous inner cylinder and atresia urceolus, is sprayed on the internal surface of inner core and the internal surface of outside surface and urceolus, 19 microns of thickness to alloy powder with plasma spraying.Crude oil sprays entering urceolus entering oil pumping pipeline after flowing into inner core, and crude oil and alloy surface layer fully act on during this period.
1100 meters of oil well depths, 5.8 tons/day of oilwell produced fluid amounts, 2.3 tons/day of oil offtake, water ratio 60%, wax content 14.5%, former employing hot-washing wax remover, hot washing period 35 days, period of removing the wax extends to 274 days behind the employing alloy tool, and wax control result is remarkable.
Claims (6)
1. special alloy with wax control function, it is characterized in that: described special alloy includes following component (weight percent wt%): Cu 65～95, and Ni 3～30, and Co 1.0～5.0, and RE 0.1～0.5, and wherein, RE is a REE.
2. according to the described special alloy with wax control function of claim 1, it is characterized in that: described REE is one of La, Ce, Pr, Nd, Gd or its combination.
3. according to the described special alloy with wax control function of claim 1, it is characterized in that: one or more (weight percent wt%) that also contain following component in the described special alloy: Ti 0.2～0.5, and B 0.03～0.10.
4. according to the described special alloy of one of claim 1～3, it is characterized in that: special alloy is sprayed on the material surface of making the wax control instrument with plasma body or spraying technology, forms highly active surperficial wax control alloy layer with wax control function.
5. according to the described application with special alloy of wax control function of claim 4, it is characterized in that: described surperficial wax control alloy layer thickness is 0.1～30 micron.
6. one kind according to the described special alloy with wax control function of one of claim 1～3, and it is characterized in that: described special alloy is used for well on the beam, all kinds of oil wells of unloading well and ground, oil field crude oil transportation system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100793476A CN102719697B (en) | 2011-03-31 | 2011-03-31 | Special alloy with function of paraffin inhibition and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100793476A CN102719697B (en) | 2011-03-31 | 2011-03-31 | Special alloy with function of paraffin inhibition and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102719697A true CN102719697A (en) | 2012-10-10 |
| CN102719697B CN102719697B (en) | 2013-04-10 |
Family
ID=46945562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100793476A Active CN102719697B (en) | 2011-03-31 | 2011-03-31 | Special alloy with function of paraffin inhibition and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102719697B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775027A (en) * | 2014-02-21 | 2014-05-07 | 江苏耐尔冶电集团有限公司 | Pipeline type special metastable alloy anti-scale and anti-paraffin tool |
| CN111593228A (en) * | 2020-05-25 | 2020-08-28 | 有研工程技术研究院有限公司 | Champagne golden copper alloy material and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101126307A (en) * | 2007-09-28 | 2008-02-20 | 王新虎 | Wax-proof anti-scaling equipment and mating oil pipe short section |
| CN102676866A (en) * | 2011-03-16 | 2012-09-19 | 中国科学院金属研究所 | Special alloy for diesel engine on saving oil and reducing emission and application of special alloy |
-
2011
- 2011-03-31 CN CN2011100793476A patent/CN102719697B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101126307A (en) * | 2007-09-28 | 2008-02-20 | 王新虎 | Wax-proof anti-scaling equipment and mating oil pipe short section |
| CN102676866A (en) * | 2011-03-16 | 2012-09-19 | 中国科学院金属研究所 | Special alloy for diesel engine on saving oil and reducing emission and application of special alloy |
Non-Patent Citations (1)
| Title |
|---|
| 高运宗等: "活泼金属合金棒快速清防蜡工艺技术研究", 《油气井测试》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775027A (en) * | 2014-02-21 | 2014-05-07 | 江苏耐尔冶电集团有限公司 | Pipeline type special metastable alloy anti-scale and anti-paraffin tool |
| CN103775027B (en) * | 2014-02-21 | 2016-03-16 | 江苏耐尔冶电集团有限公司 | A kind of pipeline type extraordinary metastable alloy antiscale wax control instrument |
| CN111593228A (en) * | 2020-05-25 | 2020-08-28 | 有研工程技术研究院有限公司 | Champagne golden copper alloy material and preparation method thereof |
| CN111593228B (en) * | 2020-05-25 | 2021-09-03 | 有研工程技术研究院有限公司 | Champagne golden copper alloy material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102719697B (en) | 2013-04-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102720466B (en) | Special alloy wax-proofing tool | |
| CN103775027B (en) | A kind of pipeline type extraordinary metastable alloy antiscale wax control instrument | |
| CN102061465B (en) | Chrome-free sealing agent | |
| CN102251247B (en) | Composite scale and rust cleaning agent | |
| CN104212428A (en) | Preparation method and application of Mannich base corrosion inhibitor suitable for high temperature acidification | |
| CN103614687A (en) | Preparation technique of continuous casting crystallizer copper plate surface cermet coating | |
| CN102719697B (en) | Special alloy with function of paraffin inhibition and application thereof | |
| CN102094135A (en) | Anti-wax anti-scaling anti-corrosion alloy material | |
| CN102373479A (en) | Steel rust removing liquid | |
| CN103614732A (en) | Environment-friendly dust and oil removal agent | |
| CN103305819B (en) | A kind of oil field tool chemical plating fluid and drilling tool corrosionproof protection method | |
| CN103604023B (en) | Method for preventing corrosion on inside of pipeline | |
| CN100494490C (en) | Technology for solving hydrogen sulphide corrosion of pipe drilling tool and pump during oil gas exploitation | |
| CN103769813A (en) | Method for manufacturing high-hardness anti-corrosion galvanized sink roll | |
| CN102796918A (en) | Special alloy having functions of inhibiting separation and agglomeration of wax in liquid | |
| CN210172520U (en) | Continuous casting nozzle prevents blockking up blowdown pipeline | |
| CN103437738B (en) | A kind of slip-type underground packing and the comprehensive apparatus for eliminating sludge that throttles | |
| CN107163986B (en) | Anti-incrustation corrosion inhibitor for petroleum refining hydrogenation technique high pressure air cooling system | |
| CN203476286U (en) | Slip type downhole packer and flow regulation comprehensive descaling device | |
| CN105969035B (en) | Pipe string of oil-water well anti-caking is cured, anti-caking colloid, asphalitine anticorrosion, antiscaling coating | |
| CN201858485U (en) | Repaired oilfield scaling oil pipe | |
| CN203961912U (en) | A kind of alloy wax control instrument of cone porous | |
| CN204717235U (en) | A kind of anticorrosive composite steel tube | |
| CN101717944B (en) | Method for preparing corrosion inhibitor by utilizing cottonseed oil | |
| CN101760188B (en) | Formula of DSS-1 corrosion inhibiter and processing technique |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20121010 Assignee: NAIR ENERGY EQUIPMENT CO., LTD. Assignor: Institute of metal research, Chinese Academy of Sciences Contract record no.: 2012210000142 Denomination of invention: Special alloy with function of paraffin inhibition and application thereof License type: Exclusive License Record date: 20121116 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EC01 | Cancellation of recordation of patent licensing contract | ||
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: NAIR ENERGY EQUIPMENT CO., LTD. Assignor: Institute of metal research, Chinese Academy of Sciences Contract record no.: 2012210000142 Date of cancellation: 20140217 |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20121010 Assignee: Jiangsu Nair Metallurgy & Electric Power Group Co., Ltd. Assignor: Institute of metal research, Chinese Academy of Sciences Contract record no.: 2014210000009 Denomination of invention: Special alloy with function of paraffin inhibition and application thereof Granted publication date: 20130410 License type: Exclusive License Record date: 20140217 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| ASS | Succession or assignment of patent right |
Owner name: JIANGSU NAIR GROUP CO., LTD. Free format text: FORMER OWNER: METALLIC INSTITUTE, CHINESE ACADEMY OF SCIENCES Effective date: 20140724 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 110015 SHENYANG, LIAONING PROVINCE TO: 214500 ZHENJIANG, JIANGSU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140724 Address after: 214500 No. 28 River Road, Xinqiao Town, Jiangsu, Jingjiang Patentee after: Jiangsu Nair Metallurgy & Electric Power Group Co., Ltd. Address before: 110015 Shenyang, Liaoning Province Cultural Road, No. 72, Shenhe Patentee before: Institute of metal research, Chinese Academy of Sciences |
|
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Jiangsu Nair Metallurgy & Electric Power Group Co., Ltd. Assignor: Institute of metal research, Chinese Academy of Sciences Contract record no.: 2014210000009 Date of cancellation: 20150813 |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20121010 Assignee: NAIR ENERGY EQUIPMENT CO., LTD. Assignor: Jiangsu Nair Metallurgy & Electric Power Group Co., Ltd. Contract record no.: 2015320000583 Denomination of invention: Special alloy with function of paraffin inhibition and application thereof Granted publication date: 20130410 License type: Exclusive License Record date: 20150908 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: NAIR ENERGY EQUIPMENT CO., LTD. Assignor: Jiangsu Nair Metallurgy & Electric Power Group Co., Ltd. Contract record no.: 2015320000583 Date of cancellation: 20160120 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180910 Address after: 214500 28 River Road, Xinqiao Town, Jingjiang, Jiangsu Patentee after: NAIR ENERGY EQUIPMENT CO., LTD. Address before: 214500 28 River Road, Xinqiao Town, Jingjiang, Jiangsu Patentee before: Jiangsu Nair Metallurgy & Electric Power Group Co., Ltd. |